45FL steel is used: for the manufacture of wear-resistant casting parts of tractors; parts of metallurgical equipment; parts of equipment for other branches of engineering where you require increased durability.

Standards

Name	Code	Standards
Steel castings	В82	GOST 977-88

Chemical composition

Standard	C	S	P	Mn	Si	Fe	V	Ti
GOST 977-88	0.42-0.5	≤0.04	≤0.04	0.4-0.9	0.2-0.52	Rest	0.05-0.1	≤0.03

Fe is the basis.
The mass fraction of S and P content is indicated for 1 group of castings from the base steel. The content of sulfur and phosphorus in the castings of groups 2 and 3, in sour and basic open-hearth steel - see Table 4a in GOST 977-88.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, MPa
Quenching with 880-920 °C + vacation at 600-650 °C, air cooling
100	≥491	≥687	≥12	≥20	≥294	-
Normalization at 880-920 °C + vacation at 600-650 °C, air cooling
100	≥392	≥589	≥12	≥20	≥294	170-229
Normalization at 940 °C (endurance 3,5 h), air cooling
100	≥580	≥710	≥18	≥26	≥360	-

Description mechanical marks

Name	Description
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	Limit short-term strength
d₅	Elongation after rupture
y	The relative narrowing
KCU	Toughness
HB	Brinell hardness number

Steel 45FL

Designation

Description

Standards

Chemical composition

Mechanical properties

Description mechanical marks

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